| open source engineering books | 1 | 0.1 | 7734 | 29 | 43 |
| books about open source | 1.29 | 1 | 2504 | 23 | 31 |
| open source engineering software | 0.25 | 0.8 | 8839 | 32 | 66 |
| open source books pdf | 0.84 | 0.7 | 5535 | 21 | 13 |
| open source engineering projects | 0.3 | 0.7 | 9668 | 32 | 83 |
| open source software book | 1.08 | 0.8 | 6494 | 25 | 19 |
| open source books library | 1.32 | 0.3 | 3738 | 25 | 31 |
| open source books downloads | 0.89 | 0.5 | 5296 | 27 | 54 |
| open source technology book pdf | 1.37 | 0.1 | 4854 | 31 | 94 |
| free open source books | 0.45 | 1 | 6220 | 22 | 16 |
| open source software engineering tools | 0.45 | 0.5 | 173 | 38 | 67 |
| free engineering books online library | 0.47 | 0.1 | 1797 | 37 | 44 |
| open source + making an ebook | 0.4 | 0.2 | 2273 | 29 | 7 |
| software engineering for beginners books | 1.14 | 0.9 | 6718 | 40 | 81 |
| open source book writing | 0.77 | 0.5 | 8843 | 24 | 28 |
| free engineering books online | 0.71 | 0.8 | 5753 | 29 | 97 |
| online library for engineering books | 0.43 | 0.1 | 6289 | 36 | 69 |
| free software engineering books | 0.63 | 0.3 | 7987 | 31 | 44 |
| books on software engineering | 0.52 | 0.6 | 2899 | 29 | 63 |
| engineering books download site | 1.79 | 0.1 | 1602 | 31 | 11 |
